Deck block



FIG. 1 is a perspective view of a deck block;

FIG. 2 is a front view of the deck block of FIG. 1, the left-side, right-side and rear views being identical thereof;

FIG. 3 is a top view of the deck block of FIG. 1; and;

FIG. 4 is a bottom view of the deck block of FIG. 1.

The broken lines shown in the drawings illustrate portions of the article and form no part of the design. 

CLAIM The ornamental design for a deck block, as shown and described. 